Research Article
Study on the Damage Model of Coal Rock Caused by Hydraulic Pressure and Electrical Impulse in Borehole
Figure 12
Opening degree of crack at 11 kV voltage and different hydrostatic pressures.
(a) 1 MPa hydrostatic pressure |
(b) 4 MPa hydrostatic pressure |
(c) 6 MPa hydrostatic pressure |
(d) 8 MPa hydrostatic pressure |